Dynamoelectric machine winding connection insulator

ABSTRACT

Coils of electric motor phase windings on a core have end turns extending beyond core end faces and have protected and electrically isolated interpole and/or external lead connections. The isolation and protection is provided by an insulator having at least one substantially enclosed receptacle open only at one or both ends thereof. Insulators in one form include a first connection receptacle wall portion formed from a single thickness of material; a second connection receptacle wall portion of a double thickness of material; and means for positively anchoring the insulator in a desired position relative to the winding end turns. In a preferred illustrated form, the connection insulator may include receptacles for receiving two separate winding connections that are to be insulated from each other, and includes an insulation barrier between the two receptacles.

United States Patent McNeal 1451 July 24, 1973 Primary Examiner-R. SkudyAttorney J0seph B. FormanJohn M. Stoudt et al.

[75] Inventor: Walter P. McNeal, Holland, Mich.

[73] Assignee: general IElgctric Company, Fort [57] ABSTRACT I a ne, n yCOllS of electric motor phase windings on a core have Flledl 1971 endturns extending beyond core end faces and have [21] AppL No: 192,204protected and electrically isolated interpole and/or 611- temal leadconnections. The lsolation and protect1on 1s provided by an insulatorhaving at least one substan- [52] U.S. CI. 310/71, 310/68 C tlallyenclosed receptacle open only at one or both ends [51] Int. Cl. H02k11/00 thereofi Insulators in one form include a first connec- Field ofSearch 63 tion receptacle wall portion formed from a single thick- 310/336/192 ness of material; a second connection receptacle wall portion ofa double thickness of material; and means [56] Refe ces C t forpositively anchoring the insulator in a desired posi- UNITED STATESPATENTS tion relative to the winding end turns. In a preferred il-3,219,ss7 11/1965 Fisher 310/71 lustrated fmm, theffmnectim insulamr mayinclude 3,523,273 9/1970 Hamme] 339/276 receptacles for rece1v1ng twoseparate winding connec- 2,872,599 2/1959 DeYoung.... 310/71 tions thatare to be insulatedfrom each other, and in- 2,169,097 8/1939 Hall 310/45eludes an insulation barrier between the two recepta- 3,457,442 7/1969Charlton 310/71 ]es 3,014,140 12/1961 Tupper 310/71 3,304,447 2/1967Lindt 310/71 10 Claims, 6 Drawing Figures I0 F 12 W11 W F c r Z" WW 7/:z E/ V I I I a I r z 7" a 1 I v 25 I A I z I I 1 l8 7; I, I x, 2! '24:*"w

s i w 1 i i z I "I I, I I I x A, I:

r l I 2 2 4 HQ I g a 1 A z Ami/11h s: I I 55 V 9 I5 I I3 PAIENIEUJUL24|915 FIGJ INVENTOR. WALTER R NONE-AL TTORNEY,

DYNAMOELECTRIC MACHINE WINDING CONNECTION INSULATOR BACKGROUND OF THEINVENTION This invention relates generally to connection insulatorssuitable for use in dynamoelectric machines, and more particularly to animproved winding connection insulator arrangement for dynamoelectricmachine stators.

In alternating current dynamoelectric machines, such as single phase ormulti-phase induction morors, a number of phase windings are carried bya magnetic material stator core. Each of the winding phases are normallyformed of coils of suitable insulated conductors with the coils definingcircumferentially spaced apart poles. Conventionally, the terminal endsof the windings are electrically connected to the bare ends of insulatedor covered external lead wires by crimp type connections or by twistingand then brazing the wire ends together. These procedures have also beenfollowed to interconnect the ends of the coils of a given phase and thusform what is known in the art as an interpole connection.

In .order to electrically insulate the above described connections fromthe windings as well as other motor parts, one practice has been tofurnish a sleeve type insulator as disclosed for example in Hall et al.U. S. Pat. No. 2,169,097, entitled DYNAMO-ELECTRIC MA- CHINE. Stillanother approach has been to utilize a generally U-shaped insulator astaught, inter alia, in Fisher U. S. Pat. No. 3,219,857, entitled CONNEC-TION INSULATORS FOR DYNAMO-ELECTRIC MACHINE WINDINGS. The disclosures ofboth of the above identified patents are specifically incorporatedherein by reference.

It would, however, be advantageous and desirable to provide a connectioninsulator that would be even more effective in withstanding (even duringwinding pressing operations) pressures exerted thereon by relativelysharp corners or edges of a winding connection insulated thereby; thatmay be achored to a winding even more securely than heretofore; thatwould permit more economical utilization of material than heretofore; orthat would provide the benefits of combinations of these desirablefeatures. Moreover, it would be desirable to provide asubstantiallyclosed tubular or sleeve shaped insulator so as to prevent theinadvertent movement of a segment of winding into a connectionaccommodating receptacle thereof; and yet avoid rupturing the insulatoras a result of compression of the insulator about an over-sizedconnection, while also providing means for reliably anchoring theinsulator within a bundle of winding end turns so as to preventwithdrawal of such connection from the insulator receptacle.

SUMMARY OF THE INVENTION Consequently, it is a general object of thepresent invention to provide an improved stator arrangement fordynamoelectric machines, including one or more connection insulatorswhich provide the desirable features and benefits mentioned above.

It is a more specific object of the present invention to provide animproved stator havingan electrical insulater for covering, isolating,and protecting winding connections which is simple in construction, iseconomical from a standpoint of material utilization, and

can be both readily positioned between winding end turns and firmlyanchored in place once assembled.

It is another object of the present invention to provide an improvedelectrical insulator arrangement that may be used both for interpole andexternal winding lead connections of an electric motor stator and whichfacilitates assembly and installation of the insulator with winding endturns.

In carrying out the objects of the present invention in one form, Iprovide a stator for use in an electric motor in which phase windingsare arranged on the core, each winding being formed of poles defined bycoils having end turns extending beyond the side or end faces of thecore. These coils may have interpole connections, as well as connectionsbetween terminal ends of coils and the bare ends of external lead wires.Each connection is electrically isolated and may be protected by asubstantially enclosed connection receiving insulator receptacle open atone or both ends thereof. Insulators in one preferred form include afirst recetpacle wall portion formed from a single thickness ofmaterial; a second receptacle wall portion of a double thickness ofmaterial; and means for positively anchoring the insulator in a desiredposition relative to the winding end turns.

After a winding connection is established, the connection is axiallyinserted into a generally tubular shaped receptacle portion of theinsulator. Prior thereto or thereafter, the anchoring portion of theinsulator may be assembled with the winding end turns by moving theanchoring means into the end turn bundle.

In a preferred illustrated form, the connection insulator may includereceptacles for receiving two separate winding connections that are tobe insulated from each other, and includes an insulation barrier betweenthe two receptacles.

The subject matter which I regard as my invention is particularlypointed out and distinctly claimed in the concluding portion of thisspecification. My invention, itself, however, together with furtherobjects and advantages thereof may best be understood by reference tothe following description taken in connection with the accompanyingdrawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 illustrates an embodiment of theinvention in a preferred form, and is a view in perspective partiallybroken away to show detail, of a portion of a statorassembly after ithas been fabricated, with connection insulators installed and windingend turns compacted and tied;

FIG. 2 is a view in perspective of one preferred form of an improvedconnection insulator shown in FIG. 1;

FIG. 3 is a view, in perspective, of another preferred form of improvedconnection insulator that also may be utilized with the core assembly ofFIG. 1;

FIG. 4 is a view in perspective, partially broken away, of the statorassembly of FIG. 1 prior to compaction and tying of the winding endturns thereof, this FIG- URE also showing the relative placement of theconnection insulators of FIGS. 2 and 3 relative to the winding endturns;

FIG. 5 is a view, with parts removed and parts broken away, thatillustrates the interrelationships of connection insulators embodyingthe invention and winding end turns during and after placement of suchinsulators; and

FIG. 6 is an end elevation, with parts removed and parts broken away, ofanother connection insulator embodying the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS With reference now to thedrawing and the exemplifications of my invention as illustrated therein,there is shown a stator assembly 10 of the type employed in alternatingcurrent single phase induction motors. The stator assembly includes acore 1 l conventionally fabricated from a presleected number ofsubstantially identical laminations l2 suitably punched out ofrelatively thin magnetic sheet material. The laminations are retained instacked, juxtaposed relation in the usual way, e.g by weldingtransversely across the stack periphery or by co-operating grooves andkeys as will be understood. Moreover, the laminations may be heldtogether by an interlaminate bonding material, also as will beunderstood.

The core 11 includes angularly spaced apart and aligned teeth 13, whichterminate at a rotor receiving bore 15 and define a number of spacedapart winding accommodating slots 16 therebetween. These slotsaccommodate windings, generally indicated by the numerals l7 and 18 inthe drawing, of different phases.

For different applications and different motor designs, the first andsecond winding phases may be of other types than as will be nowdescribed, therefore, it will be understood that the above a-d followingdescription is for purposes of exemplification only. With this in mind,the first illustrated winding 17 is a main or running winding for aresistance start induction motor and the winding 18 is an auxiliary,e.g., starting winding for the motor.

Still having reference to FIG. 1, a plurality of external lead wires areprovided for connecting the energization windings of the assembly 10 toan external power source and one such external lead wire has been shown,with parts broken away, at 18. Connected to this lead wire are one ormore winding lead wires 19 which are the lead wire portions of theenergization windings. The connection 22 has been formed with amechanical crimp type connection 20, but it will be understood that aconnection may also be made by welding, brazing, or soldering. Moreover,while only a single winding lead 19 is revealed in FIG. 1 as beingconnected to external lead wire 18, more than one winding lead may beconnected to an external lead wire.

While part of the connection insulator 21 has been broken away in FIG. 1for clarity, the unbroken insulator per se is shown in FIG. 2. Thus, theconnection 22 of FIG. 1 is actually disposed within a connectionreceiving receptacle portion of the insulator 21 and would be hiddenfrom view in FIG. 1 if the insulator 21 had not been broken away. Forcompleteness of description it should also be noted that the connectionreceiving portion of the insulator 21 includes a receptacle, open at 23,that receives a connection between still another external lead wire 24and one or more other winding lead wires.

As will be understood more clearly by reference to FIG. 2 the connectionreceiving portion or receptacles of the insulator 21 are closed by meansshown as a collapsed wall section 26. Thus, a single insulator mayinclude a pair of electrically isolated receptacles for receiving twodifferent winding connections. Moreover,

the insulator 21 includes anchoring means in the form of a depending leg27 and an anchoring lip or hook 28.

With reference now to FIG. 4, the assembly 10 has been shown with theend turn portions of the windings in an unpressed or uncompactedcondition and prior to placement of winding retaining means such aslaces therearound. Also revealed is the insulator 21 and an insulator 31having a single connection receptacle. It will be appreciated from FIG.3 that the insulator 31 is also provided with anchoring means in theform of a depending leg 32 and an anchoring lip or hook 33 thatcooperates with one or more of the end turn portions or segments of thewinding 18. Parts of the insulator 31 have been broken away to reveal abrazed and soldered connection 35 between the conductive portion of anexternal lead wire 34 and the uninsulated end 36 of one of theenergization windings of the assembly 10.

With continuing reference to FIGS. 2 and 3, the insulators 21 and 31 andone method by which they may be fabricated will be described in moredetail. It is noted, however, that the following description is forpurposes of exemplification and that the insulators could be made from achoice of different materials and also could be molded rather than beformed from strips of sheet material as will now be described.

I have found it to be both advantageous and economical to form theinsulators 21 and 31 from a strip of insulating material, preferablyplastic film, such as polyethylene terephthalate, one commerciallyavailable form of which is available under the trade name MYLAR from E.I. du Pont de Nemours & Co., Inc. The thickness of the material selectedwill depend upon both the dielectric and structural characteristics ofthe sheet material as well as the maximum voltage to be applied to agiven stator core assembly. For example, when the material is MYLAR filmand the stator core 10 is to be energized by l 10 volts, I have foundthat sheet material having a thickness of 5 mils is more than adequate.

Initailly, a length of strip material of selected thickness is rolled toform a tubular portion of an insulator such as the tubular portion 37 ofthe insulator 21 and then severed. During formation of this tubularportion, part of the tube, such as the part 38, may be formed with asingle thickness of the material whereas a different part, such as part39, will be formed with a double thickness for a purpose to be describedhereinafter. The portion 37 of the insulator is then permanentlyestablished as a tubular segment by adhesively securing orultrasonically welding the overlapping portions of the tube generallyalong the portion 40 thereof. Anchoring means are formed from the samestarting piece of strip material and include the depending leg portion27 and at least one portion extending from the plane thereof, e.g., ananchoring hook or lip 28. In order to provide two electrically insulatedreceptacles in the insulator 21, a portion of the tubular section of theinsulator is collapsed and the walls thereof secured together, again byadhesive means, heat, or ultrasonic welding as shown at 26.

At the completion of this step, two receptacles 42, 43 each open at oneend thereof will have been formed in the insulator 21. When an insulatorembodying the invention is to include only a single connectionreceptaele, the insulator 21 may be severed through the closed portion26 thereof or, alternatively, the insulator 31 of FIG. 3 may be used.

In the ease of insulator 31, a sealed portion 46 defines a closed end ofthe connection receiving receptacle 47. It should be emphasized at thispoint that, particularly in the case of the insulator 31, it may bedesirable to omit the closed portion 46 of the insulator so that thereceptacle 47- will be open at both ends thereof.

During assembly of theinsulators 21 and 31 with the stator core assembly10, the anchoring portion of the insulators may be pushed downwardlyinto end turns of the windings 17 and 18 in the relative detection ofarrow A as viewed in FIG. 4. Alternatively, as schematically indicatedby FIG. 5 the insulators may be fed tangentially into the winding endturns in the relative direction indicated by arrow B.

In either case, it is desirable for the anchoring lip or hook 28 (or lip33 of insulator 31) to engage and be anchored by at least one segment ofthe wire in the end turn portion of one of the energization windings.What is believed to be the locking interrelationship between a portionof a wire segment 51 and an uncinate member such as the lip 280f theinsulator 21 is revealed. When the insulator 21 is tangentially insertedinto the winding generally in the direction of arrow B as shown in FIG.5, the leading edge 52 of the lip 28 is believed to work its way under aportion of the winding segment 51.

Then, with subsequent movement of the insulator, the lip 28 is securedand held under the wire segment 51. During this insertion process, thebody of insulator 21 also tends to move down against the winding,apparently because the lip 28 and segment 51 coact to provide a commingaction.

With reference now to FIG. 4, it is believed that as the insulator 21 isassembled by insertion generally in the direction of the arrow A, thelip 51 is compressed against the leg 27 as it moves downward alongadjacent winding segments and, upon subsequent slight movement in adirection opposite to the direction of arrow A, the anchoring lip actsas a barb and becomes anchored under a segment of wire.

The connection insulators 21, 31 may be positioned relative to windingend turns as taught herein during different stages of manufacture of astator core as-' semlby. It is preferred, however, for eaxe of assemblyand ease of using the insulators in existing assembly procedures, toassemble the insulators with the winding end turns substantiallyimmediately after lead wire connections have been made and placed in theinsulator receptacles. This could be done prior to final compaction andforming ofthe end turns of windings l7 and 18.. 1

In the case of the stator core assembly 10, phase insulation (also knownas window" insulation) has been positioned between the end turns ofwindings 17 and 18. A portion of such insulation, with other partsbroken away, has been shown at 53 in FIG. 1. Two pieces of thisinsulation also may be viewed at 53 and 54 in FIG. 5.

Thus, in the case of the structure shown in FIGS. 1 and 5, phaseinsulation will provide a layer of insulation between connectionscontained within the insulator 21 and the winding end turns 18.Accordingly, with the wall 38 of the insulator 21 positioned against aface of the insulator S3 or 54, a double layer of positive insulationbetween winding end turn segments adjacent thereto and connections willbe provided. Accordingly, the wall 38 of the connection insulator 21 andphase insulation 53 or 54 will form one double insulating region whilethe double wall portion 39 of the insulator 21 will provide a seconddouble insulating region. It will at this time be recognized thatinsulators 21 and 31 could have double walls completely aroundthereceptacle portions thereof to provide double insulation layers evenwhen phase insulation was not to be adjacent thereto.

Moreover, since the generally tubular receptacle portions of theinsulator 21 are sealed at 40, it is virtually impossible for a segmentof a winding end turn to enter the receptacle even when the insulator isassembled adjacent to the winding end turns by the insertion processdescribed in connection with FIG. 5.

Prior to or after anchoring the insulators relative to a windingsegment, connections may be placed in the receptacles of the insulators,Again, since the receptacle portions of the insulators have beenpreviously established by being sealed along the regions 40 thereof, anyattempt to insert an oversized connection into a receptacle will bereadily apparent to anoperator. In such an event, an operator may useany suitable means to reduce the size of the connection prior to placingthe connection in an insulator receptacle.

Thus, insulators embodying the invention are of use in avoiding asituation where an oversized connection is placed within an openreceptacle that may subsequently be ruptured when it is pressed againstsuch connection during subsequent winding pressing or lacing operations.It should also be noted that compaction and/or lacing of the winding endturns result in a more compact end turn mass and further insure asubstantially permanent anchoring of the insulators 21 or 31 relative tothe end turns of windings 17, 18.

Turning now to FIG. 6, there is illustrated a connection insulator 61embodying the invention in another form. In this form, the insulator 61is provided with a double wall of insulation completely around areceptacle portion 62. The receptacle portion is sealed, e.g., byultrasonic welding along the region 63, so as to ingibit inadvertententry of a winding segment into the receptacle portion of the insulator.The insulator 61 also includes an anchoring leg 64 having a plurality ofanchoring hooks or barbs 66 formed thereon. These barbs further insureanchoring of the insulator relative to winding turn segmentscollectively indicatedby the reference numeral 68. In addition, theisarrangement shows that a single book member may be formed between thetubular portionof an insulator and the free end of a leg dependingtherefrom. i l

It will be appreciated from the foregoing that the present inventionprovides an improved connection in sulator for dynamoelectric machinewindings which is simple of construction, easily installed over aconnection, and which can afford an increased measure of reliability. Inaddition, the insulator may be more firmly anchored inplace than priorinsulators, while utilizing a minimum amount of insulating material inthe fabrication thereof and yet providing, when desired, double layersof positive insulationbetween'a connection and winding turn segments.

Accordingly, while in accordance with the Patent Statutes l havedescribed what at present is considered to be the preferred dmbodimentof my invention, it will be obvious to those skilled in the art thatnumerous changes and modifications may be made therein without departingfrom the invention. It is, therefore, aimed in the appended claims tocover all variations and modifications thereof as fall within the truespirit and scope of the invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. An inductive assembly including a magnetic core for use in anelectrical inductive device; at least one winding comprised of wireconductors arranged on the magnetic core with winding turn portionsprojecting beyond at least one face of the core, at least one end ofsaid winding including a winding lead wire; at least one external leadwire; means for electrically connecting a portion of the winding leadwire and a portion of the external lead wire; and a body of electricalinsulation accommodating said means for electrically connecting; saidbody of electrical insulation including a first part for receiving atleast the electrically connected portions of the winding lead wire andexternal lead wire, and anchoring means for holding said first part in apredetermined relationship relative to said winding turn portions; saidanchoring means including at least one leg extending from said firstpart and along the winding turn portions, and at least one uncinateportion disposed adjacent to the winding turn portions and locked withat least one segment of wire conductor to thereby resist movement of theb ody of insulation relative to said at least one winding.

2. The structure of claim 1 wherein the means for anchoring includes aplurality of uncinate portions disposed adjacent to the winding turnportions.

3. The structure of claim 1 wherein the first part of the body ofinsulation comprises a receptacle having at least one substantiallycontinuous peripheral wall sepa-.

rating the connected portions of the winding and external lead wires,and wherein inadvertent movement of a winding turn portion into thereceptacle is inhibited by the peripheral wall of the receptacle.

4. The structure of claim 3 wherein the receptacle includes a collapsedwall section that substantially closes one end of the receptacle.

5. The structure of claim 3 wherein the body of insulation includes atleast two electrically isolated connection receiving receptacles.

6. The structure of claim 3 wherein the peripheral wall is formed of alayer of sheet material and the receptacle includes a second layer ofsheet material disposed along at least a portion of the peripheral wallto thereby provide a double layer of insulation along said at least aportion of the peripheral wall.

7. The structure of claim 6 further comprising a second winding havingwinding turn portions disposed adacent to the winding turn portions ofsaid at least one winding; a second body of insulation disposed betweenthe winding turn portions of said at least one winding and said secondwinding; and wherein the at least one leg is positioned between thesecond body of insulation and the winding turn portions of a selectedone of the windings with said double layer of insulation and saiduncinate portion being positioned adjacent to the winding turn portionsof said selected one of the windings.

8. A stator for use in a dynamoelectric machine comprising a magneticcore; at least one winding arranged on said core including a number ofwire coils having end turns projecting beyond at least one face of thecore; connection means electrically joining at least one terminal end ofsaid winding to the end of at least one wire conductor; and anelectrical insulator accommodating said connection means; said insulatorcomprising an elongate tubular member having a continuous peripheralwall that defines a receptacle having at least one open end; saidinsulator further including a leg extending along a plurality of saidend turns, with the peripheral wall of the tubular member forming abarrier against movement of an end turn segment along said leg into theelongate receptacle.

9. A stator for use in an electric motor comprising a magnetic core; aplurality of phase winding arranged on said core to form a plurality ofpoles having coils composed of wire conductors, said coils having endturns projecting beyond at least one face of the core, with at leastsome of the end turns of one phase winding closely adjacent to at leastsome of the end turns of the another phase winding; connection meanselectrically joining at least one lead wire to an end of at least one ofsaid phase windings; at least one eleongate insulator formed from onesheet of electrically insulating material accommodating the at least oneconnection means; said one sheet of electrically insulating materialhaving first and second spaced apart portions thereof secured togetherat a seam exnding along said elongate insulator, said elongate insulatorincluding at least first and second receptacles separated from oneanother by third and fourth secured together portions of the one sheetof electrically insulating materail.

10. The structure of claim 9 wherein the insulator includes a dependingleg anchored against end turns of at least one of the phase windings.

Sheet 1 of 2 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTIONpatent 3,748,510 July 24, I973 Dated Inventor(s) Walter Neal It iscertified that error appears in the above-identified patent and thatsaid Letters Patent are hereby correctedas shown below:

In column 1, line 11, change "morors" to motors.

In column 1, line 41, change "achored" to -anchored.

In column 2, line 20, change "recetpacle" to receptacle.

In column 3, line 12, change "presleected" to -preselected-.

In column 3, line 30, change "a-d" to --and-; D

In column 4 line 40, change "Initailly" to Initially In column 5, line8, change "theinsulators" to the insulators. In column 5, line 11,change "derection" to -direction--.

In column 5, line 32, change "comming" to camming-. In column 5, line44, change "semlby" to -sembl In column 5, line 44, change "eaxe" toease- In column 5, line 49, change "could" to --would.

In column 6, line 40, change "ingibit" to ---inhibit-.

In column 6, line 47, change "theis" to this--.

In column 6, line 64, change "dmbodiment" to -embodiment.

In column 7, line 2 change "b ody" to -body.

In column 8, line 36, change "'eleongate" to el ongate-.

Sheet 2 of 2 I v :UNITED STATES PATENT OFFICE 7 CERTIFICATE OFCORRECTION Dated July 24, 1973 Patent No. r l0 Inventor(s) W lter P.McNeal It is certified that error appears in the above-identified patentand that said Letters Patent are hereby corrected as shown below:

In column 8, line 41, change "exnding" to extending.

In column 8, line 45, change "materail" to -material- Signed and sealedthis 9th day of July 1974.

(SEAL) Attest:

McCOY. M. GIBSON, JR. C. MARSHALL DANN Attesting Officer Commissioner ofPatents

1. An inductive assembly including a magnetic core for use in anelectrical inductive device; at least one winding comprised of wireconductors arranged on the magnetic core with winding turn portionsprojecting beyond at least one face of the core, at least one end ofsaid winding including a winding lead wire; at least one external leadwire; means for electrically connecting a portion of the winding leadwire and a portion of the external lead wire; and a body of electricalinsulation accommodating said means for electrically connecting; saidbody of electrical insulation including a first part for receiving atleast the electrically connected portions of the winding lead wire andexternal lead wire, and anchoring means for holding said first part in apredetermined relationship relative to said winding turn portions; saidanchoring means including at least one leg extending from said firstpart and along the winding turn portions, and at least one uncinateportion disposed adjacent to the winding turn portions and locked withat least one segment of wire conductor to thereby resist movement of theb ody of insulation relative to said at least one winding.
 2. Thestructure of claim 1 wherein the means for anchoring includes aplurality of uncinate portions disposed adjacent to the winding turnportions.
 3. The structure of claim 1 wherein the first part of the bodyof insulation comprises a receptacle having at least one substantiallycontinuous peripheral wall separating the connected portions of thewinding and external lead wires, and wherein inadvertent movement of awinding turn portion into the receptacle is inhibited by the peripheralwall of the receptacle.
 4. The structure of claim 3 wherein thereceptacle includes a collapsed wall section that substantially closesone end of the receptacle.
 5. The structure of claim 3 wherein the bodyof insulation includes at least two electrically isolated conNectionreceiving receptacles.
 6. The structure of claim 3 wherein theperipheral wall is formed of a layer of sheet material and thereceptacle includes a second layer of sheet material disposed along atleast a portion of the peripheral wall to thereby provide a double layerof insulation along said at least a portion of the peripheral wall. 7.The structure of claim 6 further comprising a second winding havingwinding turn portions disposed adacent to the winding turn portions ofsaid at least one winding; a second body of insulation disposed betweenthe winding turn portions of said at least one winding and said secondwinding; and wherein the at least one leg is positioned between thesecond body of insulation and the winding turn portions of a selectedone of the windings with said double layer of insulation and saiduncinate portion being positioned adjacent to the winding turn portionsof said selected one of the windings.
 8. A stator for use in adynamoelectric machine comprising a magnetic core; at least one windingarranged on said core including a number of wire coils having end turnsprojecting beyond at least one face of the core; connection meanselectrically joining at least one terminal end of said winding to theend of at least one wire conductor; and an electrical insulatoraccommodating said connection means; said insulator comprising anelongate tubular member having a continuous peripheral wall that definesa receptacle having at least one open end; said insulator furtherincluding a leg extending along a plurality of said end turns, with theperipheral wall of the tubular member forming a barrier against movementof an end turn segment along said leg into the elongate receptacle.
 9. Astator for use in an electric motor comprising a magnetic core; aplurality of phase winding arranged on said core to form a plurality ofpoles having coils composed of wire conductors, said coils having endturns projecting beyond at least one face of the core, with at leastsome of the end turns of one phase winding closely adjacent to at leastsome of the end turns of the another phase winding; connection meanselectrically joining at least one lead wire to an end of at least one ofsaid phase windings; at least one eleongate insulator formed from onesheet of electrically insulating material accommodating the at least oneconnection means; said one sheet of electrically insulating materialhaving first and second spaced apart portions thereof secured togetherat a seam exnding along said elongate insulator, said elongate insulatorincluding at least first and second receptacles separated from oneanother by third and fourth secured together portions of the one sheetof electrically insulating materail.
 10. The structure of claim 9wherein the insulator includes a depending leg anchored against endturns of at least one of the phase windings.